The invention relates to a tool body (1) for a rotating tool, in particular a drill or end milling cutter, comprising along the longitudinal axis (L) thereof: an outlet section (2), which has, at least in sections, spiral-shaped internal cooling channels (3); a supply section (4) having at least one central recess (5) extending substantially straight and parallel to the longitudinal axis (L); a joining zone (6), by way of which the outlet section (2) and the supply section (4) are connected to one another, wherein a transfer area (7) is formed, in which by way of at least one transfer cavity (81), the central recess (5) is connected to the cooling channels (3) of the outlet section (2) in a communicating manner. The invention is characterized in that in the joining zone (6), the outlet section (2) and the supply section (4) are connected to one another by way of a sinter joining, wherein the joining zone (6) extends along a cross-section of the tool body (1) and transversely to the longitudinal axis (L). The invention further relates to a method for producing a tool body.